I am a Dec 2008, 2171 applicant and i got the email too. Given one day response time.
It is great to hear that IT NOC applicants are also receiving the email!
And I also got the document-request email through my lawyer today. (but my NOC is 2121 and not IT-related, and I'm a March applicant)
So, according to the posts in this forum, it seems that the applicants with the following NOC codes are receiving email or call from AINP:
1111: Financial Auditors (applicant: Mar)
2121: Biologists (applicant: Mar)
2131: Civil Engineers (applicants: Mar)
2132: Mechanical Engineers (applicant: Mar)
2133: Electrical Engineers (applicant: Mar)
2134: Chemical Engineers (applicant: Mar)
2171: Information Systems Analysts and Consultants (applicant: Dec)